I have two GPUs in my HP DV7 Laptol and I wonder how to switch GPU I'm using at the moment?
ATI Radeon HD 4200M and
ATI Radeon HD 6600M running on my laptop and I want to change from HD 4200M to HD 6600M.
I myself had got a Laptop with two GPUs . They also supported auto-switching technology. Now when i installed ubuntu, I ran into a similar problem that when auto-switching is done, It could not switch completely which resulted into erroneous screen, ending up in unexpected system shutdown.
and setting the essential options for GPU switching(Which obviously I googled)
The condition is: The vga_switcheroo mechanism will only be active when the kernel is booted with either the "modeset=1" kernel option, and/or the "nomodeset" option being absent
Now after making the above mentioned configurations, test if vga switching works by:
and if that works, you can try out the advanced methods for vedio switching as mentioned in this article.